the chosen interface's ability to read/write data with minimal latency affects the functioning of your PSD. it really depends on what your system is , and how much money you would like to spend . fire wire and USB are the two fastest interface types, with USB being the most commonly used interface.

most bulky data - such as music,video,photographs and documents get minimal benefits from a portable SSD and thus should be stored in a separate hard disk. unlike hard disks, where 1 TB drive is affordable, SSDs' pricing is almost proportional to the capacity.

though hard disk drive come in a various sizes,320 GB capacity offers a fairly good storage capacity.

include software.

most PSDs' come with per-installed applications such as security programs, sync tools and virtual application platforms.

factor like ease of use, automatic period back ups and customization as per the users needs should be considered while evaluating the software that bundled with the hard drive.

support/warranty.

before investing in a PSDs look for manufacturers customer service through online documentation like FAQs or a knowledge base. customers should be able to reach support by phone or e-mail. a lifetime warranty ensure you will have your drive for years to come.

physical feature.

ensure that your PSD is ergonomically designed and has practical features with ease-of-use. for example, uSB flash drivers come with swivel caps fir extra protection. it is better to invest in portable HDDs that do not require any power source or cord-clutter for operation.

decide if you need a more protective case .

if you are rough on your drives, hauling them everywhere and dropping them into a briefcase or bag, choose drives that's robust and can take the abuse.

noise.

unlike traditional HDDs being mechanically designed,SSDs have no moving parts, meaning no sound while it's operating and much safer in use.

key technical features that buyers should consider while choosing PSDs are endurance,speed,security,capacity,interface options, cost per GB,inbuilt data protection and recovery features,bundled software,form factors - color and shapes,robust build quality including water and fire proofing and lastly regulatory compliance.